1380249587 has 4 divisors (see below), whose sum is σ = 1380324600. Its totient is φ = 1380174576.

The previous prime is 1380249557. The next prime is 1380249613. The reversal of 1380249587 is 7859420831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1380249587 - 2⁶ = 1380249523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380249557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11039 + ... + 53687.

It is an arithmetic number, because the mean of its divisors is an integer number (345081150).

Almost surely, 2^1380249587 is an apocalyptic number.

1380249587 is a deficient number, since it is larger than the sum of its proper divisors (75013).

1380249587 is an equidigital number, since it uses as much as digits as its factorization.

1380249587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75012.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 1380249587 is about 37151.7104182297. The cubic root of 1380249587 is about 1113.4033968620.

The spelling of 1380249587 in words is "one billion, three hundred eighty million, two hundred forty-nine thousand, five hundred eighty-seven".